Metal-bending machine



June 26, 1928;

J. E. NAUDAIN METAL BENDING MACHINE 2 Sheets-Sheet I Filed Nov, 26, 1926attomq June 26, 1928.

J. E. NAUD-AIN METAL SENDING MACHINE- I 2 ShQets-Sheet v2 Filed Nov. 26;1926 Patented June 26, 1928.

warren STATES JOHN NAUDAIN, orlsieennows ronr'r, MARYLAND.

METAL-'BENDING MACHINE.

Application filed November as, 1926. serial 110.150,?25.

This'invention relates to improvements in metal bending machines and hasparticular reference .to a machine wherein plurality of independentlyadjustable formers are employed around which the bending operation takesplace in conjunction with a handoperated sweep bar and head to eflectthe bending.

The object of a simple and easily opera-ted machine embodying twoformers :forv right or left hand bending and a head so located withrespect to the two formers that] it may be swung in conjunctionwith'either former to effect the bending desired.

TllG'illVElllllOIl is illustrated in the accompanying drawing, wherein,-

Fig. 1 shows the complete machine in side.

readiness for a left-hand bending opera tion' r Fig. 1 illustrates thesame parts but with the head and bar moved to the left at the end of thebending operation;

Fig. 5 shows a cross-sectional detail through the guide-block whichcarries one of the formers the section being talren on the line 5-5 ofFig. 2; and

Fig. Sillustrates a cross-sectional detail through the center of thetable showing the pivot of the head mounted therein, and it also showsthe two right-angle faces of the head in side elevation.

Referring to the drawings, the numeral 10 designates a base having acentral vertical column or pedestal 11 which carries a circularhorizontal flange 12 at its upper end.

On top of the circular flange 12 of the pedestal there is a flat bed 13having two extensions 1 1 and 15, andwhich extensions are provided withiguideways 16 and 17. These extensions and gui'deways are disposed onlines at right angles with respect to each other.

Each guideway is provided with horizontal guide-flanges 18 at oppositesides thereof, and the outer ends of the guideways are closed bycross-bars 19 which are held in place by stud-bolts 20.

A screw-shaft 21 extends horizontally into the guideway 16 and a similarscrew-shaft the invention is to provide '22 extends into the guideway17. These screw-shafts have their outer-ends BXt6I1Clextensions ll'andthe flat bed 13 is provided 'onits under side with a downwardlyex tend'ing tubular boss 25 which latter projects down into the pedestal 11,-as shown in Fig. '6, and this boss-has a vertical bear- .ing-opening 27with an enlarged annular recess 26 around its upper end and in the topsurface of the bedv for a will presently be explained;

In the guideway 16 there mounted a piirpose which movable block 28,while in the guideway 17 there is a similar block 29; Each block hasguide-grooves 30 in its opposite sides to receive the guide-flanges 18;so as to slide thereon, and these blocks 28 and 29 have screw-threadedpassages 31 extending longitudinally therethrough so that thescrewshafts 21 and 22 'may extend lengthwise through the blocks.

The shafts 21 and 22 are held in the crosshars 1 9 against longitudinalmovement so that when either of them is rotatechth'e block 28 or29-engaging that shaft will be moved forwardor back in a horizontalplane according to the direction the shaft is rotated.

On the block 28 there is an upright former '32 which extends above thebed 13, while the block 29 has a 'siinilarupright former 33. Eachupright former has a dovetail shaped projection St on its vertical face,and to the former 32there is at tach'ed a former-block 35, while to theblock 36.

The former blocks and 36 each have dovetail shaped grooves therein so asto fit and slide onto the dovetailed shaped projections 84, and by meansof this construction, one former block may readily be removed andreplaced by another, either of the same exterior shape or of a slightlydifferent exterior shape to suit the particular bending work to be done.

The structure is such that when the two guide-blocks 28 and 29 are movedtoward the center of the column to the full limit of their movement,their fiat vertical faces former 33 there is attached a former willabut, but either of them may be moved independently of the other.

In addition to the two guide-blocks,

formers, and former-blocks, I also employ a post 38. This post snuglyfits and extends down into the vertical bearing-opening 27 through theboss 25, and the circular plate 37 seats in the annular recess 26, inthe top surface of the bed between the right-angle extenslons, as shownIn Fig. 6.

Extending vertically from the circular flange 37 is a bender-head proper39, which latter has two right-angled faces 40 and 41, which facesextend radially with respect to the central vertical axis of the pivotpost 38.

A side lug or enlargement 42 extends laterally and horizontally from thehead 39, and this lug hasa horizontally-extending U-shaped recess 43 inits upper side. An operating bar 44 has its end 45 extending into therecess 43 of the head, and a bolt 46 extends through the lugof the headand also through the bar-end to hold the latter in place.

The operation of the machine briefly is as follows:

Presuming a bar of metal 47 is to be bent into a right-angle form withthe turn or bend extending in a left-hand direction.

The bender block 29 will be left in its innermost position in theguideway 17, and the head 39 will be swung around until its face 41seats against the vertical face of the block 29, as shown in Fig. 3.When the head 39 and block 29 are in this position, the vertical bendingface 40 of the head will be in alinement with the former-block 36 ofblock 29.

The bar 47 to be bent is then laid on the bed 13, so as to extenddiametrically across the circular plate 37 of thebender-head, and theblock 28 is then moved inwardly in the guideway 16 until it, clamps thebar 47 against the former-block 36.

This operation leaves the blocks 28, 35 set forward from the center ofthe benderhead plate 37 a distance equal to the thick ness of the bar 47that is to be bent, as shown in Fig. 3, and everything is then set forthe actual bending operation.

The operating bar 44 is then grasped by hand and pushed horizontally,causing the head with its fiat face 40 to swing in the direction of thearrows in Fig. 3, and in doing so, the bar 47 Will'be bent around theformer-block 35 until it is forced against the sides of said blocks 28and 35 as shown in Fig. 4.

Having thus completed the operation of bending the bar 47, the block 28may now be retracted by moving the same outwardly in the guidewa 16 andthe bent bar may then be remover The adjustment of the parts is rapidlyeffected to position the bar to be bent, and the bending and removal ofthe bent bar is quickly accomplished.

Having described my invention, I clann,-

1. In a machine for bending metal bars, the combination with a pedestal,of a bed mounted on the pedestal and having two portions which extend atright angles with respect to each other, said bed also having a tubularboss depending from its under side into the pedestal, each of the saidtwo right-angled extensions of the bed having guideways with blockstherein, a former carried by and extending vertically above each of saidblocks and each former being provided with a detachable formerblock, abender-head pivotally engaging the tubular depending boss and extendingdown into the pedestal, and means for adjusting the blocks in theguideways of the rightangled extensions.

2. In a machine for bending metal bars, the combination with a pedestal,of a bed mounted on the pedestal and having two portions which extend atright angles with respect to each other, said bed also having a tubularboss depending from its under side into the pedestal, each of the saidtwo right-angled extensions of the bed'having guideways with blockstherein, a former carried by and extending vertically above each of saidblocks, a former-block for each former, said blocks and formers havingdovetail connections whereby the blocks may be detached, means foradjusting the blocks in the guideways of the right-angled extensions,and a bender head having a post which passes down into thetubular bossof the bed whereby to pivotally mount the same centrally over thepedestal In testimony whereof I aflix my signature.

JOHN E. NAUDAIN;

